We have found one software suitable in our database for this conversion.
You can find special text-to-speech synthesizers that allows users to create an audio (like .mp3 file) with a speech from a saved text file, or document but they are usually pretty expensive. And even that will in most cases require manual tweaking during the process because otherwise the audio would not be perfect.
However, you most likely won't find a simple tool or converter for doc to mp3 conversion that does the job with a single click.
DOC
doc file extension is commonly used for text documents created in Microsoft Word word processor before version 2007. Word DOC documents can be opened in almost every (if not every) other word processor, such as OpenOffice.org Writer or iWork Pages.
MP3
The mp3 file extension is traditionally used for one of the most common types of compressed audio files, MP3s, which you can playback using almost any media player.